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Effects of arbuscular mycorrhizal fungi on growth and nitrogen uptake of Chrysanthemum morifolium under salt stress

机译：盐胁迫下丛枝菌根真菌对菊花生长和氮素吸收的影响。

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摘要

Soil salinity is a common and serious environmental problem worldwide. Arbuscular mycorrhizal fungi (AMF) are considered as bio-ameliorators of soil salinity tolerance in plants. However, few studies have addressed the possible benefits of AMF inoculation for medicinal plants under saline conditions. In this study, we examined the effects of colonization with two AMF, Funneliformis mosseae and Diversispora versiformis, alone and in combination, on the growth and nutrient uptake of the medicinal plant Chrysanthemum morifolium (Hangbaiju) in a greenhouse salt stress experiment. After 6 weeks of a non-saline pretreatment, Hangbaiju plants with and without AMF were grown for five months under salinity levels that were achieved using 0, 50 and 200 mM NaCl. Root length, shoot and root dry weight, total dry weight, and root N concentration were higher in the mycorrhizal plants than in the non-mycorrhizal plants under conditions of moderate salinity, especially with D. versiformis colonization. As salinity increased, mycorrhizal colonization and mycorrhizal dependence decreased. The enhancement of root N uptake is probably the main mechanism underlying salt tolerance in mycorrhizal plants. These results suggest that the symbiotic associations between the fungus D. versiformis and C. morifolium plants may be useful in biotechnological practice.
机译：土壤盐分是全世界普遍且严重的环境问题。丛枝菌根真菌（AMF）被认为是植物对土壤盐分耐性的生物改良剂。但是，很少有研究解决在盐分条件下接种AMF对药用植物的潜在好处。在这项研究中，我们在温室盐胁迫实验中研究了两种AMF的定殖作用，分别是mosununeformis mosseae和Verserforma versiformis，对药用植物Morifolium（Hangbaiju）的生长和养分吸收的影响。经过6周的非盐碱预处理后，含和不含AMF的杭白菊植株在使用0、50和200 mM NaCl达到的盐度水平下生长五个月。在中等盐度条件下，尤其是在Ver.formisformis定植的条件下，菌根植物的根长，枝条和根干重，总干重和根系N浓度均高于非菌根植物。随着盐度增加，菌根定植和菌根依赖性降低。根吸收氮的增加可能是菌根植物耐盐性的主要机制。这些结果表明，真菌D. versiformis和C. morifolium植物之间的共生联系可能在生物技术实践中有用。

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